DIY Damp Course - in three easy steps

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How to install a cream silicone damp proof course

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There are three easy steps to installing an injected Damp Proof Course;

1. Mark the holes 6 inches (150mm) above the ground and drill with a 12mm masonry bit. Drill into the joint, brick or stone horizontally or at a slight down angle.

2. Inject the DPC Quick Cream very gently and slowly, from the base of the hole outwards.

3. Insert a DPC Plug, to seal the hole. You can mortar over this with coloured mortar, if you wish.

The Damp Proof Course can go into the Mortar Joint or into the Brick or Stone.

A Calibrated Dose Gun avoids waste.

Step one - drill a 12mm diameter hole for the DPC InjectionStep two - inject the DPC CreamStep three - fill the hole with a plug

Step 1 - Drill 12mm diameter holes. Step 2 - Inject the Quick Cream gently. Step 3 - Inset the DPC Plastic Plug.

Options for larger damp proofing projects;

A. Use the 1 Litre Cartridge - a Calibrated Dose Gun avoids waste

One Litre Cartridge of DPC Cream in a skeleton gunOne Litre skeleton gun next to a one litre cartridge

B. Use the 3 Litre Bucket of Cream in a Pump up Pot

Pump up pot for injecting DPC CreamUsing a Pump Up Pot to inject DPC Cream through an injection rod

Note - injection, no matter which method you use, requires virtually no pressure.

Our Damp Proofing required: Quick Cream DPC, Skeleton Gun - either a 380cc or professional 1000cc, Option - Calibrated Dose Gun.

Optional Products: Renderproof Replastering Additive (5 litre), Wall Plugs, Boron Ultra Gel (2.5 litre), UltraProof exterior wall treatment (5 litre or 25 litre), Anti-Mould Paint (2.5 litre), Professional Skeleton Guns (380cc or 1000cc), Professional Extension Nozzle (for repeated use with 1000cc cartridges)

Tools Required: 12mm masonry bit, electric hammer drill, eye protection

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Typical damp proofing cream injection usage rates

4.5 inch thick (115mm) single leaf wall - 1000cc (1 litre) per 9 metres, inject from either side

9 inch thick wall (230mm) double leaf solid or cavity - 1000cc(1 litre) per 4.5 metres, inject from one side or from both sides.

18 inch thick wall (460mm) solid or random fill - 1000cc (1 litre) per 2 metres, inject from both sides

Replastering Notes

Don't forget that replastering is essential if dampness has affected your plaster because of the 'salts' that come with the water: you have two options - either replaster to our specification using sand and cement, with Renderpruf salt inhibitor/waterproofer in the water or look at the Wall Membrane option. Wall Membranes offer a considerable improvement over sand and cement - they produce a warmer surface, can be insulated easily and can be directly plastered with lightweight, modern plasters, like Carlite Bonding.

For easy fix Membrane information go to:

Mesh Membrane showing quick fix plugKontract Membrane for floors

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Learn from the UK's top Expert: become your own expert - save money.

Quick DIY Master Class in Dampness and Condensation - become your own Expert in 1 hour! Buy our "Dampness in Buildings" reprinted book by the great expert Graham Coleman. A great read, short and to the point.

Click here to buy the reprint.

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Site written by: David Moore

David Moore, B.A. (Hons.), C.T.I.S., C.R.D.S. Technical Author


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